Erskine May is the eponymous guide to parliamentary practice and procedure, providing accurate and detailed information on the constituent parts of Parliament, its powers and jurisdictions, membership of either House, financial procedure and the process of debate.Alongside the incremental changes to and refinements of parliamentary practice which happen all the time, the 25th edition covers many significant developments since the last edition in 2011, including:* A new chapter on "English Votes for English Laws" introduced following the 2015 General Election, which details the varied and complex ways in which these engage with both primary and secondary legislation.